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Final report on ichthyologic work under the project C. J1620240 in 2016.
Kubečka, Jan ; Matěna, Josef ; Čech, Martin ; Blabolil, Petr
Young-of-the-year pike fry was stocked artificially along the left bank of the reservoir Švihov in May 2016. In July 2016 fingerlings inhabited mostly the shallowest littoral. Densities ranged from 1 to 2 pc 100m coast in the dam part into 7-8 pieces per 100 m of the coast in the middle part. Sampling pike fingerlings in the littoral zone has a high efficiency (estimate 84%). Any other observations (installing traps, scuba diving, sampling electrode farther from shore) show that pike fry did not occur at greater depths than most shallow littoral to about half a meter. The densities of fry at the right and left bank of the reservoir apparently did not differ. Even very small pike are probably able to swim across the large reservoir. Of the 81 individuals of pike fry with food 77.8% had a fish prey, and 17.3% had insect larvae in the gut.
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A new tool for improvement the quality of water ecosystems
Blabolil, Petr ; Říha, Milan ; Peterka, Jiří ; Prchalová, Marie ; Vašek, Mojmír ; Frouzová, Jaroslava ; Jůza, Tomáš ; Muška, Milan ; Tušer, Michal ; Draštík, Vladislav ; Ricard, Daniel ; Sajdlová, Zuzana ; Šmejkal, Marek ; Vejřík, Lukáš ; Matěna, Josef ; Borovec, Jakub ; Kubečka, Jan
The Czech multimetric fish based index (CZ-FBI) was developed recently. The aim of CZ-FBI is to assess the ecological potential of heavily modified and artificial water bodies and to detect ecosystems, particularly their specific components, in unsatisfactory conditions. This article describes steps of CZ-FBI development. Since the philosophy used, particular events presenting the results, to recent stage. CZ-FBI is a part of certified methodology of the Ministry of the Environment of the Czech Republic and the comparison with other assessment methodologies within a geographical intercalibration group is in process.
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Methodology for assessing ecological potential of heavily modified and artificial water bodies
Borovec, Jakub ; Hejzlar, Josef ; Znachor, Petr ; Nedoma, Jiří ; Čtvrtlíková, Martina ; Blabolil, Petr ; Říha, Milan ; Kubečka, Jan ; Ricard, Daniel ; Matěna, Josef
Methodology for the assessment of the ecological potential of heavily modified and artificial water bodies was developed, including water body typology. The selection of indicator metrics was based on statistical analyses of the sensitivity of each of the indicators towards the most significant stressor – eutrophication. According to these results, biological communities and their indicators were selected to comply with the requirements set forth in the Water Framework Directive (2000/60/EC).
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Methodology for assessing ecological potential of heavily modified and artificial water bodies – a proposal
Borovec, Jakub ; Hejzlar, Josef ; Znachor, Petr ; Čtvrtlíková, Martina ; Blabolil, Petr ; Říha, Milan ; Matěna, Josef ; Kubečka, Jan
Methodology for the assessment of the ecological potential of heavily modified and artificial water bodies of the lacustrine type was developer, including also typology of water bodies. The selection of indicator metrics was based on statistical analyses of the sensitivity of each of the indicators towards the most significant stressor – eutrophication. According to these results, biological communities and their indicators were selected to comply with the requirements of the Water Framework Directive (2000/60/EC).
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Past, present and future of lake trauts
Blabolil, Petr ; Peterka, Jiří ; Čech, Martin ; Draštík, Vladislav ; Frouzová, Jaroslava ; Jůza, Tomáš ; Kratochvíl, Michal ; Matěna, Josef ; Muška, Milan ; Prchalová, Marie ; Říha, Milan ; Sajdlová, Zuzana ; Šmejkal, Marek ; Tušer, Michal ; Vašek, Mojmír ; Vejřík, Lukáš ; Kubečka, Jan
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What do the fish say about the quality of aquatic ecosystems
Blabolil, Petr ; Říha, Milan ; Peterka, Jiří ; Prchalová, Marie ; Vašek, Mojmír ; Jůza, Tomáš ; Čech, Martin ; Draštík, Vladislav ; Kratochvíl, Michal ; Muška, Milan ; Tušer, Michal ; Frouzová, Jaroslava ; Ricard, Daniel ; Mrkvička, Tomáš ; Sajdlová, Zuzana ; Vejřík, Lukáš ; Šmejkal, Marek ; Borovec, Jakub ; Matěna, Josef ; Boukal, David S. ; Kubečka, Jan
The first Czech methodology for the assessment of ecological potential of heavily modified water bodies and artificial water bodies based on fish communities was developed. The first step of developing the methodology was preparing the typology of water bodies. The typology distinguishes between water bodies of different altitudes and with and without thermal stratification. Fish were sampled by multimesh gillnets following European standard procedures. The selection of fish metrics was based on statistical analyses in which metrics (fish community indicators) were correlated with the most common stressor – eutrophication. The analysis detected several sensitive metrics (metrics showing the best correlation with the stressor) in which ecological class boundaries were set. Afterwards, combination of sensitive metrics was used for calculation of the ecological quality ratio (EQR) for each of the reservoir sampled. The EQR expresses the deviation between a reservoir’s current ecological status and its maximum potential. The next step consisted of validating the EQR with an independent pressure index and verifying the time stability of ecological potential assessment. The metrics used in the methodology fulfill all the obligations set forth in the Water Framework Directive (2000/60/EC), which include assessment of the composition, abundance and age structure of fish fauna.
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